How does one now highlight or select only particular verses?
Logos 6 tries to be too helpful and selects all the verses for the passage.
This could be helpful, but I would rather control the verses selected.
You'll want to turn off "Smart Text Selection".
Tools > Program Settings > Text Display > Smart Text Selection: Off
In addition to what Brian said, you can also temporarily override smart selection by holding down the ALT/Option key while selecting.